Internal-combustion-engine governor



Oct. 15, 1929. R. A. OGLESBY INTERNAL COMBUSTION ENGINE GOVERNOR 2 Sheets-Sheet Filed Aug. .12; 1927 Inventor Attorney Oct. 15, 192-9. R. A. OGLES BY 1,731,392

' v INTERNAL COMBUSTION ENGINE GOVERNOR Filed Aug. 12. 1927 2 sheets-Shem 2 Z Q Inventor Attorney asst s c octyis, 192a,

EICEA A. @GLESBY, 0F MISHEWAKA, INDIANA, ASSIIIGIQ'OTILt, BY MESNE ASSIGN- MENTE, TO QUICK ACTION IGNITION COMPANY, A CORPORATION OF INDIANA rn'rnsa-oomnusrion-nnemn oovnnnon Application filed August 12, 1927. Serial No. 212,453. I

My invention relates to improvements in governors for internal combustion engines and it more especially consists of the features pointed-out in the claims.

' The purpose of my'invention is to provide an automatic governor for internal combustion engines, which comprises a pair of coop crating ignition jcircuit controlling cams which rotate in unison with the engine shaft that has one of the cams stationary or fixed on its rotating support; that has the other cam movable approximately in a radial direction under the control of a centrifugal governor which also rotates with the cams; that at normal speeds, the governor holds the movable cam out. of contact with a non-rotating circuit breaker arm; that at excessive speeds, the governor shifts themovable cam into circular alignment with the fixed cam so as to lengthen the are or total angular length of cam action when both cams are being engaged by the breaker arm; that when the speedagain drops due tothe ignition circuit being deprived of current, the movable cam again recedes inwardly into an inoperative position; and that through the extreme sensitive v ness of the governor action the engine speed is controlled within a small change of about "twenty revolutions per minute, cutting in at approximately 1020 R. P. M. and cutting out at about 1040 R. P. M. I

With these and other ends in view I illustrate in the accompanying drawing such adaptations as will disclose thebroad underlying features of my invention without limiting myself to the specific details shown thereon and described herein Fig. l. is a diagrammatic outside elevation partly in section of the cooperating parts at the period of maximum induction at normal speed. i

Fig. 2 is a similar view to Fri 1 showing the parts non-inductive and the idle position oi? the auxiliary cam at excessive speeds. 1

Fig. 3 is a side elevation in'section of the magneto with the cooperating cam and governor parts;

Fig. 4 is a diagrammatic view of a breaker arm and its associated-circuit.

My invention is distinguished from the cam is shiited by a governor arm so as to ground the ignition circuit at excessive en gine speeds. Instead ofdoin thisI automatically add to the length 0 a permanent cam so as to hold the circuit breaker arm out of engagement withits contacts while the permanent magnet of the magneto has traveled past its inductive relation to the armature, thus depriving the engine of its ignition spark and in consequence lowering its speed to a predetermined point, when the over-all arc of the cam is again automatically shortened, for normal speed operation. I

The mechanism is exceedingly simple. It comprises any'desired rotating support, such as the dome 2 of an outboard motor, the fly wheel of an engine etc. to which a permanent cam 10 is attached, usually adjacent the engine shaft 1. In addition a shiftable or auxiliary cam. 11 is attached to a governor arm 12 which at 13 is pivoted on the support, seats to rotate with it. The support also carries with it a permanent magnet 5 secured thereon in any desired manner. Adjacent the poles of the magnet a stationary armature 22 may be secured or it may be permanently attached I to the engine frame in any desired manner for fixed sparking conditions which are only changed through the automatic control of the governor. There is .no grounding of an active current to deprive the'en ine of aspark but on the contrary the ignition circuit is simply made inactive by causing hate to be, broken. There is thus established a close interdependence between the fixed. angular movement of the rotating magnet 6 and the two circuit breaking cams 10 and 11, which is only modified by changing the radial position of the governor controlled cam 11 whilemain- 'taining the radial position of the fixed cam 10 unchanged.

The action of my device is exceedingly simple, during normal operation the governor cam 11 is inactive, permitting the primary circuit 27 to be broken by the fixed cam 10 at the point or time of maximum induction shown in Fig. 1. When an excessive speed is reached the governor cam 11 is brought into action so as to virtually. become an extype ofen 'ine governors in which a single reduced to normal tensionof the fixed cam ltl, causing the break-- or 17 to operate, hence there is no sparlr to produce an explosion in the engine thus lowering its-speed. As soon as the speed is the governor cam 11. again becomes inactive ermitting the breaker 17 to operate again. n practice it has been found that ordinarily a short governor cam causes the breaker points to be held open too short a time to permit the magnetic flux to properly build up in the armature and lengthening such a single cam is unsatisfactory.

The construction is additionally described, as follows :--In order that the working parts may be fully protected the dome 2 has an outside flange t to the inside of which the permanent magnet 6 is secured in nor so as to rotate with it. The dome is held concentric with the engine shaft 1 by its suporting hub 3 and it may be fastened securely y a key as shown in Fig. 1 or a nut 8 and tapered end as shown in Fig. 3. The permanent magnet 5 has an air gap 6 between 1ts pole ends 7 These pole ends, one at a time, span the space between the armature heads.

The governor arm 12 with its attached cam 11 beyond the pivot 13 has suficient weight to cause the cam to move outward as the speed of rotation increases against the tensionof a spring 14 attached to the other end of the,

governor arm 12 and to the ma et carrier or dome 2 in any desired adjusta le or fixed manner. On the governor arm 12 a fibre stop 15 is placed. It limits the inward movement of the arm as it engages the broadened fixed cam 10 or is b i'o ught'to a stop by any other expedient. Its outward 'movement is also limited by astop'16. a

The circuit breaker comprises an arm 17 pivoted on a bracket 18 that is attached to the armature plate 24. It controls the primary circuit 27 by means of its contact 19. The front end 20 of this arm is curved as shown so as to gently ride onto the cams 10 or 11 once for each revolution of the dome 2. A condenser 21 is connected in parallel with the any desired manmenace 5 What ll claim is:

hustion engines, a rotative engine shaft, field magnet poles rotatable with the shaft, a sta tionary armature in concentric relation to the magnet poles, a circuit-breaker connected to the armature, and to an ignition circuit, a centrifugal governor rotating in unison with the field magnet, a cam. actuated by the ov-= ernor, a separate fixed cam positioned adjacent the movable cam both cams rotata is with the field magnet, and means for automatically controlling the ignition circuit through the centrifugal force of the governor, said means being arranged to deprive the ignition circuit of current at excessive engine speeds through the action of the movable cam and restore the current at a lowered speed through the normal action of the-fixed cam.

2. In speed governors for magneto controlled internal combustion engines, a rotating field magnet, a stationary armature, governing means carried in unison with the mag" net, a circuit breaker connected to the arma ture and an engine ignition circuit, means for automatically operating the circuit breaker at excessive speeds, and separate means for operating such breaker at normal speeds.

3. In ,governing systems, a rotating carrier, a stationary circuit breaker, a centrifugally actuated governor for operating the ICHARD A. O LESBY.

contacts 19. It is also attached to the armature plate 24. 'The armature coil 22 is provided with projecting heads 23 which span the air gap 6 of the magnet. The armature plate 24 practically closes the space between I itself and the flange 4 ofthe dome to completely enclose the governor and magneto mechanism. It may have a hub shown in Fig. 3 which surrounds the engine bearing where it is adjusted into osition and held b a set screw or otherwisei desired by any we 1 knownspark control means, not shown, so

. that the angular relation of the armature heads 23-is not accidentall changed and the outer surface of these hea s is maintained in close concentric relation to the pole heads 7.

As this mechanism produces a supersensitive control the invention is claimed in its.

broadest scope.

- In testimony; whereof I aflix signature. 

